High Altitude - Improved Performance Calibration
83ford14 Article No. 83-12-15ALTITUDE ADJUSTMENT (5.8L) - MODIFICATION OF SEA LEVEL CALIBRATION FOR IMPROVED PERFORMANCE AT HIGH ALTITUDE
LIGHT TRUCKS 1983 ECONOLINE AND F SERIES
CALIBRATION: 1-64H-R02 and over 8500 GVW 5.8L
Customers who have relocated and/or continually operate the subject vehicles in high altitudes (above 4,000 feet altitude) may have the following modifications performed on their vehicles to improve driveability:
1. Remove and retain existing PCV valve (EV-68, D8TE-6B890-BA) and replace with new PCV valve (Part No. EV-93, D7AZ-6A666-A).
2. For under 8500 lb. GVW Econoline calibration 1-64H-R02, reset ignition initial timing to 6~ BTDC above specification given on the Vehicle Emission Control Information decal.
3. Remove the choke plate lever and reposition the choke plate rod to the ("alt") altitude setting. (Refer to the 2150 carburetor section of the 1983 Light Truck Engine Service Manual.)
4. Check and reset curb and fast idle speeds per the specifications given on the Vehicle Emission Control Information label.
5. Obtain a Vehicle Emission Control Information Update Label (available at all Ford or Lincoln-Mercury dealers) and fill in the appropriate information. In the top paragraph of the label, cross off the altitude (HIGH or LOW) that does not apply and enter the number of the Technical Service Bulletin and Article Number that provided the modification instructions. Write in the remarks as illustrated in the appropriate Article, including the new specifications where a space has been provided and the actual numbers have been left blank. At the bottom of the label, enter the date the modification was performed. Select a prominent place adjacent to the Vehicle Emission Control Information decal suitable for installing the label. Do not install the label on any component that can be easily detached from the vehicle. Clean the area, install the label and cover it with a clear plastic decal shield.
NOTE: The Vehicle Emission Control Information Update Label is a now label to be used for altitude modifications. DO NOT use the AUTHORIZED MODIFICATIONS Label which is used to indicate other types of modifications.
6. Give original PCV valve to customer in case customer returns to sea level operation. To return a vehicle to sea level operation, reverse the above procedure and remove the Vehicle Emission Control Information Update Label.
PART NUMBER PART NAME CLASS
D7AZ-6A666-A PCV Valve A
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: M
TIME: "Actual Time" as defined in the Warranty and Policy Manual. DLR. CODING: Basic Part No. DRIVE Code: F7
PROGRAM CODE: L05 (The program code is to be entered in the program code box on the warranty claim form 1863).